Summary Press a piece of dry ice between surfaces to make sqealing and chattering noises. Science content Chemistry: States of Matter, Properties of Materials (K-7) Physics: Light and Sound (1) Lessons activity is in Dry ice activities Resource Dry ice source Materials dry ice and gloves to handle coins aluminium pie plate metal spoon Procedure 1. Press side of coins into dry ice. The coins flip back and forth. The warm coins heat the dry ice and turn it to gas. The gas escapes in the enclosed space pushing the coin back and forth. 2. Place a piece of dry ice in an empty aluminum pie pan and press on it with a metal spoon. You should hear squealing or squeaking sounds as the spoon and pan vibrates. This is caused by heat from the spoon and pan warming the carbon dioxide and changing it from solid to gas (sublimation), which then pushes the ice away from the spoon and pan, causing them to vibrate. Grades taught Gr 4 Gr 5
